teufant



(No Model.)

W. E. TRUFANT.

COPYING PRESS xt'. g l u n UNITED STATES PATENT OFFICE.

W'ALTER E. TRUFANT, UF NIV HAVEN, CONNECTICU".

COPYING-PRESS.

SPECIFICATION forming part of Letters Patent No. 411,559, datedSeptember 24, 1889.

Application filed August I8, 1888. Serial No. 283,125. (No model.)

To aZZ whom it 71mg/ concern:

Beit known that l, WALTER E. Tennant, of New Haven, in the county of NewHaven and State of Connecticut, have invented certain new and usefulImprovements in Copying-Presses, of which the following, taken inconnection with the accompanying drawings, is a specification.

My invention relates to certain improvements in presses used for takingimpressioncopies of written matter upon dampened pages by means ofmechanical pressure, the object being to provide a press which retainsall the convenience of the ordinary screwpress, but which can be moreeasily and quickly operated, and at the same time giving greaterpressure.

It consists of a screw-press, which may be of the ordinary construction,having a pressshaft through the center of the pressingserew operated bya cani pivoted to the top of said screw, which cani is operated by alever, and in devices for adjusting the length of the screw as relatedto said press-shaft, and for holding the lever in position when not inuse.

Figure 1 in the drawings is a side elevation of a copying-pressembodying my improvements. Fig. 2 is a section of the same, takenthrough the line X X.

Similar letters refer to similar parts in both iigures.

A is the base of the press.

B is the yoke, which extends over the base and supports thepressing-screw I).

C is the platen, upon which the screw acts, and between which and thebase the book is pressed. L is asocket upon the platen, which receivesthe end of thc screw.

N is the press-shaft, which passes through the axis ofthe screw D andrests upon the platen. The cam I is pivoted to the top of the screw, soas to act upon the top of the press-shaft, and is operated by the leverII.

E is a sleeve threaded to and forming a part of the screw D, and is usedto adjust the length of the screw in relation to the press-shaft, and ismade fast to said screw by the lock-nut F. In this case the sleeve E isalso used as a hand-wheel for operating the screw.

l and U' are lips upon the sleeve, between which the cam I is pivoted bymeans of the pin J.

K and Ii are springs fastened to the lips G and G', which clasp and holdthe lever ll in an upright position when not in use.

The operation of my invention is as follows: The copy-book containingthe letters to be copied is placed upon the base-plate A, and the platenC brought down to rest upon it by turning the screw I) to the right. Thecani I is then, by moans of the lever ll', brought to the position shownby the dotted lines in Fig. l, thus forcing the press-shaft down uponthe platen (i and forcing said platen down away from the screw to thep0- sition indicated by the dotted lines in Fig. l. W'hen the book hasbeen pressed a sutiicient length of time, the lever ll is brought to anupright position, where it is held by the springs K and l. The pressurethen being removed, the platen is raised to allow lthe book` to beeasily removed by turning the press-screw to the left.

lf the press-shaft or cam become worn or upset, they may be readj ustedby loosening the lock-nut F and screwing down the sleeve E to the properposition. I do not confine myself to the use of a lock-nut for holdingthe sleeve fast to the screw, and may use a removable key or other meanswhen desirable.

NV hat I claim as new, and desire to secure by Letters latent of theUnited States, is

I. In a copying-press, the combination, with a base-plate platen andyoke, of a screw passing through the yoke, having a pressshaft passingthrough its axis and resting upon the platen and operated by a campivoted to the upper end of said screw, whereby thc pressure is appliedand removed, substantially as and for the purpose described.

2. In a copyingpress, the combination, with the operating-screw having apressshaft passing through its axis and operated by a cani, ol' a sleeveforming the upper end of said screw to which said cam is pivoted, saidsleeve being threaded to said screw, whereby the wear of the parts maybe taken up, substantially as and for the purpose described.

3. In a copyingpress, the combination, with an operating-screw having apress-shaft IOO passing through its axis, actuated by a @am to thisspeeifeaiiomin the presence of two subpivoted to the upper end of saidScrew and serhiug witnesses,0n this 14th day of August, operated by alever, and springs fastened to A. I). 1888.

said screw, which clasp and hold Said lever NVALTER E. 'VRUFANT in anupright position, substantially as and .Vitnesses: for the purposedescribed. JOSEPH II. KEEFE,

In testimony whereof I have signed my name EDWIN PURRINGTON.

